ingrain

To dye with a fast or lasting colour.

To make (something) deeply part of something else.

The dirt was deeply ingrained in the carpet.

The lessons I learned at school were firmly ingrained in my mind.

Dyed with grain, or kermes.

Dyed before manufacture; said of the material of a textile fabric.

Thoroughly inwrought; forming an essential part of the substance.

When were such changes ever made in men's natural relations to one another: when was such reconcilement of ingrain differences ever effected!

An ingrain fabric, such as a carpet.